Incoming Resources
- Gems of the world, Cally Oldershaw
- Gems, the world's greatest treasures and their stories, by Bernhard Graf
- Gems, Ronald Louis Bonewitz
- The jeweler's directory of gemstones, a complete guide to appraising and using precious stones, from cut and color to shape and setting, Judith Crowe
- Jade, Christine Petersen
- Gemstones, a concise reference guide, Robin Hansen